package com.atguigu.springcloud.service;

import cn.hutool.core.util.IdUtil;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.PathVariable;

import java.util.concurrent.TimeUnit;

@Service
public class PaymentService {
    //成功
    public String paymentInfo_OK(Integer id) {
        return "线程池：" + Thread.currentThread().getName() + "   paymentInfo_OK,id：  " + id + "\t" + "amazed---+---哈哈哈";
    }


    /**
     * 设置自身调用超时时间的峰值，峰值内可以正常运行，超过了需要有兜底的方法处理，作服务降级fallback
     * 失败
     *
     * fallbackMethod  备选方法名
     *commandProperties  条件 如果 超时异常在3000毫秒以内进执行之前的方法
     * 否则就执行备选的方法
     *
     * 只要是当前服务不可用都会做服务降级  不关是超时还是代码错误
     * @param id
     * @return
     */
    @HystrixCommand(fallbackMethod = "paymentInfo_TimeOutHandler", commandProperties = {
            @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds", value = "5000")  //3秒钟以内就是正常的业务逻辑
    })
    public String paymentInfo_TimeOut(Integer id) {
        int a=10/0;
//        try {
//            TimeUnit.MILLISECONDS.sleep(6000);
//        } catch (Exception e) {
//            e.printStackTrace();
//        }
        return "线程池：" + Thread.currentThread().getName() + "   paymentInfo_TimeOut,id：  " + id + "\t" + "呜呜呜" + " 耗时(秒)" ;
    }

    public String paymentInfo_TimeOutHandler(Integer id) {
        return "线程池：" + Thread.currentThread().getName() + "   paymentInfo_TimeOutHandler,id：  " + id + "\t" + "备选方案d=====(￣▽￣*)b老子是降级";
    }


    //服务熔断
    //x次下失败率达到y%就断路  在xxx秒 后  尝试半开放           源码 HystrixCommandProperties
    @HystrixCommand(fallbackMethod = "paymentCircuitBreaker_fallback",commandProperties = {
            @HystrixProperty(name = "circuitBreaker.enabled",value = "true"),  //是否开启断路器
            @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold",value = "10"),   //请求次数
            @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds",value = "10000"),  //时间范围
            @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage",value = "60"), //失败率达到多少后跳闸
    })
    public String paymentCircuitBreaker(@PathVariable("id") Integer id){
        if (id < 0){
            throw new RuntimeException("*****id 不能负数");
        }
        String serialNumber = IdUtil.simpleUUID();

        return Thread.currentThread().getName()+"\t"+"调用成功,流水号："+serialNumber;
    }
    public String paymentCircuitBreaker_fallback(@PathVariable("id") Integer id){
        return "id 不能负数，请稍候再试,(┬＿┬)/~~     id: " +id;
    }






}
